* {
  margin: 0;
  padding: 0; }

body, html {
  width: 100%;
  height: 100%; }

.box {
  width: 100%;
  height: 100%;
  position: relative; }
  .box .yingying {
    width: 100%;
    height: 100%;
    z-index: 20;
    display: none;
    background: black;
    background: rgba(0, 0, 0, 0.5);
    position: relative;
    position: absolute; }
    .box .yingying img {
      width: 80%;
      height: 12rem;
      position: absolute;
      top: 25%;
      left: 10%; }
    .box .yingying .tan_first {
      width: 100%;
      text-align: center;
      font-size: 1rem;
      position: absolute;
      top: 15.5rem; }
    .box .yingying .tan_last {
      width: 100%;
      position: absolute;
      top: 48%;
      text-align: center; }
      .box .yingying .tan_last input {
        width: 50%;
        height: 2rem;
        border: none;
        background: #FDE32C;
        border-radius: 15px;
        outline: none; }
  .box img {
    width: 100%;
    height: 100%;
    position: absolute;
    z-index: 0; }
  .box .content {
    width: 100%;
    height: 35%;
    position: absolute;
    bottom: 16%;
    z-index: 10; }
    .box .content .wuyong {
      width: 92%;
      height: 100%;
      margin: 0 auto; }
      .box .content .wuyong ul {
        width: 100%;
        height: 70%;
        list-style: none; }
        .box .content .wuyong ul li {
          width: 100%;
          height: 32%;
          border-top: 1px solid gainsboro;
          border-bottom: 1px solid gainsboro;
          display: flex; }
          .box .content .wuyong ul li .inp {
            width: 10%;
            height: 100%;
            display: flex;
            align-items: center;
            justify-content: center; }
            .box .content .wuyong ul li .inp img {
              width: 4%;
              height: 7%; }
          .box .content .wuyong ul li .wenzi {
            font-size: 0.8rem;
            height: 100%;
            display: flex;
            align-items: center;
            color: darkslategray; }
      .box .content .wuyong .btn {
        width: 100%;
        height: 30%;
        display: flex;
        flex-direction: row;
        justify-content: space-between;
        align-items: flex-end; }
        .box .content .wuyong .btn a {
          width: 38%;
          height: 60%; }
          .box .content .wuyong .btn a input {
            width: 100%;
            height: 100%;
            border-radius: 8px;
            background: yellow;
            outline: none;
            border: none;
            font-size: 0.7rem;
            color: #353430; }

.nav {
  width: 100%;
  background: #302F36;
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 3rem;
  position: absolute;
  z-index: 10; }

.nav_a span {
  color: white;
  font-size: .7rem;
  vertical-align: middle; }

.nav_a span:first-child {
  font-size: 1.5rem;
  margin-left: 1.2rem; }

.nav p {
  color: white;
  font-size: .9rem; }

.nav_aa {
  display: flex;
  margin-right: 5%; }

.nav_aa span {
  display: block;
  width: .4rem;
  height: .4rem;
  border-radius: 100%;
  background: white;
  margin: 0  .02rem; }
